CN101928806B - Composite slagging agent for semi-steel making and preparation method thereof and semi-steel making method - Google Patents
Composite slagging agent for semi-steel making and preparation method thereof and semi-steel making method Download PDFInfo
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Abstract
The invention provides a composite slagging agent for semi-steel making. The composite slagging agent contains iron oxide, MnO and SiO2, wherein the iron oxide is Fe2O3 and/or FeO. The invention also provides a preparation method for the composite slagging agent and a semi-steel making method. According to the composite slagging agent provided by the invention for semi-steel making, the preparation method is simple, the consumption of the composite slagging agent in the semi-steel making process is low, and the composite slagging agent can be used for slagging and dephosphorization in the semi-steel making so that the semi-steel making process is performed more smoothly; and meanwhile, the composite slagging agent can effectively improve the Mn element content of the final molten steel and correspondingly reduce the consumption of Mn-containing alloy added in a subsequent step of the steel making production so as to reduce the steel making production cost.
Description
Technical field
The present invention relates to a kind of composite fluxing medium for semi-steel making, also relate to the preparation method of this composite fluxing medium and the method for the semi-steel making that uses this composite fluxing medium.
Background technology
Part iron factory adopts vanadium titano-magnetite to smelt, in order to guarantee efficient utilization of resource, before steel-making, usually carry out desulfurization and process for extracting vanadium, Carbon Content is 3.2-3.8% in the half steel after the desulfurization vanadium extraction, the quality percentage composition of phosphorus is 0.06-0.08% in the half steel, and the content of all the other silicon, manganese heating element is trace.Because the content of silicon, manganese heating element is trace, therefore in the semi-steel making process, exist heat source insufficiency and slagging speed to wait slowly problem, therefore, in order effectively to carry out semi-steel making, in steelmaking process, need to add compound slag making materials assurance slag carbon drop and dephosphorization effect.
In the prior art, converter mud fluoride-free composite fluxing medium and MnO fluoride-free composite fluxing medium are used for common molten iron-steelmaking to have had bibliographical information.
" climbing development and the application of steel steel-making composite fluxing medium " (people such as Luan Qiusheng, " steel vanadium titanium ", and the 4th phase of the 21st volume, a kind of composite fluxing medium for semisteel converter steelmaking disclosed in p55-58) in December, 2000, this composite fluxing medium contains SiO
2, CaO, MnO and Al
2O
3And the impurity such as S, P.This composite fluxing medium can shorten the formation time of initial stage slag, guarantees that effectively smelting process carries out smoothly.Yet there is the defective such as Mn constituent content low (Mn element quality percentage composition only has 0.02-0.04%) in large usage quantity and the endpoint molten steel in this composite fluxing medium in the process of semi-steel making.
Summary of the invention
The object of the invention is to overcome the composite fluxing medium that exists in the above-mentioned prior art low defective of Mn constituent content in large usage quantity and the endpoint molten steel in the semi-steel making process, provide a kind of in the semi-steel making process composite fluxing medium that is used for semi-steel making of Mn constituent content in the less and Effective Raise endpoint molten steel of consumption, the preparation method of this composite fluxing medium also is provided, also provides and used this composite fluxing medium to carry out the method for semi-steel making.
The invention provides a kind of composite fluxing medium for semi-steel making, wherein, described composite fluxing medium contains ferriferous oxide, MnO and SiO
2
The present invention also provides a kind of preparation method of composite fluxing medium of the present invention, the method comprises, be below the 1mm with silicate-type manganese ore, iron scale, quartz sand and binding agent pulverizing and jevigating to granularity, and mix and obtain mixture, this mixture is pressed into pelletizing, will carries out roasting after this pelletizing drying.
The present invention also provides a kind of Semi-steel making method, and the method comprises by the oxygen rifle the half steel molten steel oxygen supply in the converter, and adds quickened lime and composite fluxing medium in converter, and described composite fluxing medium is composite fluxing medium provided by the invention.
According to the composite fluxing medium for semi-steel making provided by the invention, the preparation method is simple, and the consumption in the semi-steel making process is less, can be effective to the semi-steel making dephosphorization, and semi-steel making technique is carried out more smoothly; Mn constituent content in the energy Effective Raise endpoint molten steel correspondingly reduces and adds the consumption that contains the Mn alloy in the STEELMAKING PRODUCTION subsequent step simultaneously, thereby reduces the STEELMAKING PRODUCTION cost.
Embodiment
Composite fluxing medium for semi-steel making provided by the invention contains ferriferous oxide, MnO and SiO
2Wherein, described ferriferous oxide is Fe
2O
3And/or FeO.
According to composite fluxing medium provided by the invention, in the preferred case, take the gross weight of composite fluxing medium as benchmark, the content of described ferriferous oxide is 5-35 % by weight, preferred 8-27 % by weight, more preferably 10-25 % by weight, SiO
2Content be 30-70 % by weight, preferred 39-62 % by weight, more preferably 50-65 % by weight, the content of MnO is that the total amount of 10-35 % by weight, preferred 12-27 % by weight, more preferably 15-25 % by weight, and composite fluxing medium is 100 % by weight.When described ferriferous oxide is Fe
2O
3During with FeO, Fe
2O
3Be preferably 1 with the weight ratio of FeO: 1-3.
According to composite fluxing medium provided by the invention, under the preferable case, described composite fluxing medium is pelletizing shape, and its mean particle size is 10-50mm, and water content is less than 5 % by weight, and dropping strength is 8-12 time/ball.Satisfy the composite fluxing medium of above-mentioned mean particle size and requirement of strength, can easily blanking from feed bin, in the blanking process, be difficult for efflorescence and fragmentation simultaneously; Thermosteresis when the moisture content of composite fluxing medium is required to guarantee making steel safety and reduces steel-making.
Term as used herein " dropping strength " is illustrated on the rubber plate test object is fallen and crackle or broken number of times do not occur from 1 meter height.
The preparation method of composite fluxing medium provided by the invention comprises, be below the 1mm with silicate-type manganese ore, iron scale, quartz sand and binding agent pulverizing and jevigating to granularity, and mix and obtain mixture, this mixture is pressed into pelletizing, to carry out roasting after this pelletizing drying, preferably carry out seasoning, pelletizing is difficult for forming crackle.
According to the preparation method of composite fluxing medium provided by the invention, the equipment of the above-mentioned equipment that grinds mixing and pressed pellet can adopt and well known to a person skilled in the art various device, for example grinds mixing equipment and can adopt crusher and ball mill; The equipment of described pressed pellet can adopt symmetrical ball press or tablets press.
Preparation method according to composite fluxing medium provided by the invention, in the preferred case, the condition of described compacting so that after the roasting dropping strength of pelletizing be 8-12 time/ball, the time of described drying is 48-72 hour, the temperature of described roasting is 250-350 ℃, described roasting the time chien shih roasting after the water content of pelletizing less than 5 % by weight of pelletizing gross weight.Under normal conditions, the condition of described compacting is for the pressure of compacting is 12-20MPa, and the roasting time of agglomerates that makes the water content of pelletizing after the roasting be less than 5 % by weight of pelletizing gross weight is 0.5-1 hour.
Preparation method according to composite fluxing medium provided by the invention, in the preferred case, gross weight based on described mixture, the consumption of described silicate-type manganese ore is the 40-60 % by weight, the consumption of described iron scale is the 5-15 % by weight, the consumption of described quartz sand is the 30-40 % by weight, and the consumption of described binding agent is the 4-6 % by weight.
According to the preparation method of composite fluxing medium provided by the invention, under normal conditions, described silicate-type manganese ore contains MnO 35-45 % by weight, contains SiO
2The 30-40 % by weight contains ferriferous oxide 10-20 % by weight; Described iron scale contains ferriferous oxide 92-97 % by weight; Described quartz sand contains SiO
2The 95-98 % by weight; Described binding agent contains SiO
2The 55-75 % by weight.
Preparation method according to composite fluxing medium provided by the invention, the various binding agents that described binding agent can select those skilled in the art to commonly use, the preferred employing contains silicon bonding, contains silicon bonding and for example is selected from wilkinite, diatomite, silicon gel, silicon sol and the water glass one or more.
According to the preparation method of composite fluxing medium provided by the invention, this mixture is pressed into pelletizing after, preferably sieve, screen out some particles in small, broken bits, guaranteeing the integrity of pelletizing, and then carry out drying and roasting.
Semi-steel making method provided by the invention comprises, to the half steel molten steel oxygen supply in the converter, and adds quickened lime and composite fluxing medium by the oxygen rifle in converter, and described composite fluxing medium is composite fluxing medium provided by the invention.
The main component of described quickened lime is CaO, the activity degree of lime with in and the Ca (OH) that produces of quicklime slaking
2The concentration that consumes is that the milliliter number of 4mol/L hydrochloric acid represents.Usually activity degree is that the above lime of 300ml/4N-HCl is called quickened lime.Generally, the content of CaO is the 80-90 % by weight in the described quickened lime, is preferably the 84-88 % by weight, uses quickened lime can significantly shorten the scorification time at steel-making converter initial stage, and very favourable to dephosphorization.
According to Semi-steel making method provided by the invention, under the preferable case, the SiO in the CaO in the described quickened lime and the described composite fluxing medium
2Weight ratio CaO/SiO
2Be 2.5-5, the consumption of described composite fluxing medium is the 10-15kg/t half steel.
According to Semi-steel making method provided by the invention, under the preferable case, the described quickened lime and the described composite fluxing medium that add in the described converter carry out in two batches, first added before the beginning oxygen blast in 1-3 minute, the add-on of first composite fluxing medium is the 1/2-2/3 of composite fluxing medium gross weight, the SiO in the CaO in first quickened lime and first composite fluxing medium
2Weight ratio CaO/SiO
2Be 2.5-3; Second batch added before stopping oxygen blast in 3-5 minute, and the add-on of second batch composite fluxing medium is the composite fluxing medium of residual content, and the add-on of described quickened lime is for making CaO and SiO in the terminal point slag
2Weight ratio CaO/SiO
2Be 3-4; The oxygen supply condition of described oxygen rifle can condition known in those skilled in the art, and for example, the oxygen supply pressure of described oxygen rifle is 0.85-0.9Mpa, and oxygen supply intensity 3.5-3.78m3/t molten steel min, oxygen supply time are 780-1020 second.Above-mentioned CaO and SiO
2Content be reduced value.When first adds quickened lime and composite fluxing medium, by adjusting CaO/SiO
2Weight ratio, can accelerate the formation of slag, thereby improve the efficient of semi-steel making; When second batch adds quickened lime and composite fluxing medium, by adjusting CaO/SiO
2Weight ratio, suitably increase the amount of quickened lime, can reach the effect that fully removes phosphorus.
According to Semi-steel making method provided by the invention, under the preferable case, the bath temperature of described converter is 1650-1685 ℃ after oxygen blast finishes.
According to Semi-steel making method provided by the invention, finally obtain qualified molten steel, in this qualified molten steel the quality percentage composition of P less than 0.015%, Mn quality percentage composition is 0.1-0.25%, the quality percentage composition of C is that the quality percentage composition of 0.05-0.15%, S is less than 0.015%.
The below adopts the mode of embodiment that the present invention is described in further detail.
Embodiment 1
The iron scale that adopts, silicate-type manganese ore, quartz sand and as shown in table 1 as the bentonitic chief component of binding agent.
Table 1
| Title | Fe 2O 3(% by weight) | FeO (% by weight) | SiO 2(% by weight) | MnO (% by weight) |
| Iron scale | 30.47 | 62.71 | 3.74 | |
| The silicate-type manganese ore | 2.76 | 6.14 | 37.1 | 42.3 |
| Quartz sand | 97.1 | |||
| Wilkinite | 61.25 |
1, preparation composite fluxing medium
Be 10: 50: 35 in mass ratio with the iron scale in the above-mentioned table 1, silicate-type manganese ore powder, quartz sand and wilkinite: 5 add in the muller sand mills and grind and mixing and stirring, and the granularity of resulting mixture is below 1.0mm.Then this mixture is joined in the symmetrical ball press, pressure at symmetrical ball press is under the condition of 15Mpa, squeeze out the pelletizing that diameter is 10-50mm, with pelletizing seasoning 48 hours, and be roasting 0.5 hour under 300 ℃ the condition in temperature, obtain pelletizing shape composite fluxing medium, the water content of this composite fluxing medium is 4 % by weight.
Adopt chemical analysis method that the composition of resulting composite fluxing medium is detected, the main component that obtains this composite fluxing medium is: Fe
2O
3Be that 4.23 % by weight, FeO are 9.07 % by weight, MnO 20.06 % by weight, SiO
254.63 % by weight.
Dropping strength to resulting composite fluxing medium is tested, and the result is that dropping strength is 9 times/ball.
2, carry out semi-steel making
The content of CaO is 87.2 % by weight in the quickened lime that adopts.
With the combined blown converter semi-steel making of the above-mentioned composite fluxing medium that makes for 120 tons, the main component of half steel molten steel is: 3.78 % by weight C, 0.02 % by weight Mn, 0.005 % by weight S, 0.068 % by weight P, surplus is Fe.
After above-mentioned half steel molten steel is blended into converter, fall oxygen rifle (Lavalle 535 type oxygen rifles) beginning oxygen blast, oxygen blast pressure is 0.9Mpa, and oxygen supply intensity is 3.6m
3/ t molten steel min; In the oxygen blown while of beginning, in converter, add first composite fluxing medium and quickened lime, and after the beginning oxygen blast, in the 3min first composite fluxing medium and quickened lime are all added, the add-on of quickened lime and composite fluxing medium is respectively 16kg/t half steel and 8kg/t half steel (CaO/SiO
2Weight ratio is 2.96).
After the initial stage slag forms, add second batch composite fluxing medium and quickened lime in converter, and all add in the 3min before stopping oxygen blast, the add-on of quickened lime and composite fluxing medium is respectively 18kg/t half steel and 5kg/t half steel.When being 810 seconds, oxygen supply time promotes oxygen rifle oxygen feeding stop.Recording bath temperature is 1667 ℃.
Come out of the stove and obtain qualified molten steel, CaO/SiO in the terminal point slag
2Weight ratio be 3.96.The main component that adopts chemical analysis method to record molten steel is: 0.12 % by weight C, 0.176 % by weight Mn, 0.011 % by weight P, 0.008 % by weight S, surplus is Fe.
Comparative Examples 1
Carry out semi-steel making by the description in " climbing development and the application of steel steel-making composite fluxing medium ".
Composite fluxing medium contains SiO
242.68 % by weight, CaO 15.03 % by weight, Al
2O
34.30 % by weight, MnO 7.89 % by weight and the impurity such as P, S.Granularity is 30-40mm.
Carry out according to the method that the 2nd step was carried out semi-steel making among the embodiment 1, different is, adopts above-mentioned composite fluxing medium, and the consumption of composite fluxing medium is the 18.45kg/t half steel.
Come out of the stove and obtain qualified molten steel, the main component that adopts chemical analysis method to record molten steel is: 0.08 % by weight C, 0.034 % by weight Mn, 0.022 % by weight P, 0.008 % by weight S, surplus is Fe.
Embodiment 2
Be 15: 40: 40 in mass ratio with the iron scale in the above-mentioned table 1, silicate-type manganese ore powder, quartz sand and wilkinite: 5 add in the muller sand mills and grind and mixing and stirring, and the granularity of resulting mixture is below the 1.0mm.Then this mixture is joined in the symmetrical ball press, pressure at symmetrical ball press is under the condition of 15Mpa, squeeze out the pelletizing that diameter is 10-50mm, with pelletizing seasoning 48 hours, and be roasting 1.0 hours under 250 ℃ the condition in temperature, obtain pelletizing shape composite fluxing medium, the water content of this composite fluxing medium is 2 % by weight.
Adopt chemical analysis method that the composition of resulting composite fluxing medium is detected, the main component that obtains this composite fluxing medium is: Fe
2O
3Be that 5.83 % by weight, FeO are 13.6 % by weight, MnO 17.22 % by weight, SiO
259.42 % by weight.
Dropping strength to resulting composite fluxing medium is tested, and the result is that dropping strength is 11 times/ball.
2, carry out semi-steel making
The content of CaO is 87.2 % by weight in the quickened lime that adopts.
With the combined blown converter semi-steel making of the above-mentioned composite fluxing medium that makes for 120 tons, the main component of half steel molten steel is: 3.84 % by weight C, 0.024 % by weight Mn, 0.008 % by weight S, 0.074 % by weight P, surplus is Fe.
After above-mentioned half steel molten steel is blended into converter, falls the oxygen rifle and begin oxygen blast, oxygen blast pressure is 0.9Mpa, and oxygen supply intensity is 3.6m
3/ t molten steel min; In the oxygen blown while of beginning, in converter, add first composite fluxing medium and quickened lime, and after the beginning oxygen blast, in the 3min first composite fluxing medium and quickened lime are all added, the add-on of quickened lime and composite fluxing medium is respectively 13kg/t half steel and 7.5kg/t half steel (CaO/SiO
2Weight ratio is 2.57).
After the initial stage slag forms, add second batch composite fluxing medium and quickened lime in converter, and all add in the 3min before stopping oxygen blast, the add-on of quickened lime and composite fluxing medium is respectively 13kg/t half steel and 3.5kg/t half steel.When being 930 seconds, oxygen supply time promotes oxygen rifle oxygen feeding stop.Recording bath temperature is 1680 ℃.
Come out of the stove and obtain qualified molten steel, CaO/SiO in the terminal point slag
2Weight ratio be 3.64.The main component that adopts chemical analysis method to record molten steel is: 0.11 % by weight C, 0.13 % by weight Mn, 0.013 % by weight P, 0.011 % by weight S, surplus is Fe.
Embodiment 3
Be 5: 60: 30 in mass ratio with the iron scale in the above-mentioned table 1, silicate-type manganese ore powder, quartz sand and wilkinite: 5 add in the muller sand mills and grind and mixing and stirring, and the granularity of resulting mixture is below the 1.0mm.Then this mixture is joined in the symmetrical ball press, pressure at symmetrical ball press is under the condition of 15Mpa, squeeze out the pelletizing that diameter is 10-50mm, with pelletizing seasoning 48 hours, and be roasting 0.5 hour under 350 ℃ the condition in temperature, obtain pelletizing shape composite fluxing medium, the water content of this composite fluxing medium is 3 % by weight.
Adopt chemical analysis method that the composition of resulting composite fluxing medium is detected, the main component that obtains this composite fluxing medium is: Fe
2O
3Be that 3.24 % by weight, FeO are 6.95 % by weight, MnO 25.21 % by weight, SiO
251.27 % by weight.
Dropping strength to resulting composite fluxing medium is tested, and the result is that dropping strength is 9 times/ball.
2, carry out semi-steel making
The content of CaO is 87.2 % by weight in the quickened lime that adopts.
With the combined blown converter semi-steel making of the above-mentioned composite fluxing medium that makes for 120 tons, the main component of half steel molten steel is: 3.63 % by weight C, 0.028 % by weight Mn, 0.008 % by weight S, 0.071 % by weight P, surplus is Fe.
After above-mentioned half steel molten steel is blended into converter, falls the oxygen rifle and begin oxygen blast, oxygen blast pressure is 0.9Mpa, and oxygen supply intensity is 3.6m
3/ t molten steel min; In the oxygen blown while of beginning, in converter, add first composite fluxing medium and quickened lime, and after the beginning oxygen blast, in the 3min first composite fluxing medium and quickened lime are all added, the add-on of quickened lime and composite fluxing medium is respectively 16kg/t half steel and 9kg/t half steel (CaO/SiO
2Weight ratio is 2.92).
After the initial stage slag forms, add second batch composite fluxing medium and quickened lime in converter, and all add in the 3min before stopping oxygen blast, the add-on of quickened lime and composite fluxing medium is respectively 15kg/t half steel and 5kg/t half steel.When being 1020 seconds, oxygen supply time promotes oxygen rifle oxygen feeding stop.Recording bath temperature is 1656 ℃.
Come out of the stove and obtain qualified molten steel, CaO/SiO in the terminal point slag
2Weight ratio be 3.63.The main component that adopts chemical analysis method to record molten steel is: 0.09 % by weight C, 0.21 % by weight Mn, 0.010 % by weight P, 0.012 % by weight S, surplus is Fe.
The total consumption of composite fluxing medium is respectively in above-described embodiment 1,2,3: 13kg/t half steel, 11kg/t half steel, 14kg/t half steel, and all much lower than the consumption 18.45kg/t half steel of composite fluxing medium in the Comparative Examples 1.Mn element mass content is respectively in the molten steel that finally obtains in above-described embodiment 1,2,3: 0.176%, 0.13%, 0.21%, and all 0.034 % by weight than Comparative Examples 1 is high; And the mass content of P element is respectively 0.011%, 0.013%, 0.010% in the molten steel that finally obtains among the embodiment 1,2,3, and all 0.022 % by weight than Comparative Examples 1 is low.
Can find out by above-described embodiment and Comparative Examples, adopt composite fluxing medium provided by the invention to carry out the converter semi-steel making compared with prior art, the consumption of (1) composite fluxing medium reduces, and can reduce the 4-7kg/t half steel; Redox reaction occurs in the C and the MnO in the manganese ore that (2) take full advantage of in steel-making thermal source and the half steel, makes Mn quality percentage composition raising 0.1-0.18% in the molten steel, thereby can reduce the consumption 1.5-3kg/t. steel that follow-up interpolation contains the Mn alloy.(3) steelmaking process is carried out more smoothly, the dephosphorization better effects if.
Claims (10)
1. the method for a semi-steel making, the method comprise by the oxygen rifle the half steel molten steel oxygen supply in the converter, and add quickened lime and composite fluxing medium in converter, it is characterized in that, described composite fluxing medium contains ferriferous oxide, MnO and SiO
2, described ferriferous oxide is Fe
2O
3And/or FeO, take the gross weight of composite fluxing medium as benchmark, the content of described ferriferous oxide is 10-25 % by weight, SiO
2Content be that the content of 50-65 % by weight, MnO is the 15-25 % by weight; SiO in CaO in the described quickened lime and the described composite fluxing medium
2Weight ratio CaO/SiO
2Be 2.5-5, the consumption of described composite fluxing medium is the 10-15kg/t half steel; The raw material of preparation composite fluxing medium is silicate-type manganese ore, iron scale, quartz sand and binding agent.
2. method according to claim 1, wherein, described ferriferous oxide is Fe
2O
3And FeO, and Fe
2O
3With the weight ratio of FeO be 1:1-3.
3. method according to claim 1, wherein, described composite fluxing medium is pelletizing shape, and its mean particle size is 10-50mm, and water content is less than 5 % by weight, and dropping strength is 8-12 time/ball.
4. method according to claim 1, wherein, the method for preparing composite fluxing medium comprises, be below the 1mm with silicate-type manganese ore, iron scale, quartz sand and binding agent pulverizing and jevigating to granularity, and mix and obtain mixture, this mixture is pressed into pelletizing, will carries out roasting after this pelletizing drying.
5. method according to claim 4, wherein, based on the gross weight of described mixture, the consumption of described silicate-type manganese ore is the 40-60 % by weight, the consumption of described iron scale is the 5-15 % by weight, and the consumption of described quartz sand is the 30-40 % by weight, and the consumption of described binding agent is the 4-6 % by weight.
6. according to claim 4 or 5 described methods, wherein, described binding agent is selected from one or more in wilkinite, diatomite, silicon gel, silicon sol and the water glass.
7. method according to claim 4, wherein, the condition of described compacting so that after the roasting dropping strength of pelletizing be 8-12 time/ball, the time of described drying is 48-72 hour, the temperature of described roasting is 250-350 ℃, described roasting the time chien shih roasting after the water content of pelletizing less than 5 % by weight of pelletizing gross weight.
8. method according to claim 7, wherein, the condition of described compacting is 12-20MPa for the pressure of compacting, the time of described roasting is 0.5-1 hour.
9. method according to claim 1, wherein, the described quickened lime and the described composite fluxing medium that add in the described converter carry out in two batches, first adds in after the oxygen blast 1-3 minute of beginning, the add-on of first composite fluxing medium is the 1/2-2/3 of composite fluxing medium gross weight, the SiO in the CaO in first quickened lime and first composite fluxing medium
2Weight ratio CaO/SiO
2Be 2.5-3; Second batch added before stopping oxygen blast in 3-5 minute, and the add-on of second batch composite fluxing medium is the composite fluxing medium of residual content, and the add-on of quickened lime is for making CaO and SiO in the terminal point slag
2Weight ratio CaO/SiO
2Be 3-4;
The oxygen supply pressure of described oxygen rifle is 0.85-0.9Mpa, oxygen supply intensity 3.5-3.78m
3/ t molten steel min, oxygen supply time are 780-1020 second.
10. method according to claim 1, wherein, the bath temperature of described converter is 1650-1685 ℃ after oxygen blast finishes.
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| CN102199682B (en) * | 2011-04-13 | 2013-01-09 | 攀钢集团钢铁钒钛股份有限公司 | Semisteel steelmaking method |
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| CN104711390B (en) * | 2015-03-16 | 2016-11-02 | 攀钢集团研究院有限公司 | A kind of hot metal containing low silicon vanadium extraction by converter blowing chromium slag state regulator and preparation method thereof |
| CN104694699B (en) * | 2015-03-16 | 2016-08-24 | 攀钢集团研究院有限公司 | A kind of vanadium chromium slag slag state regulator and preparation method thereof |
| CN108018417A (en) * | 2017-12-11 | 2018-05-11 | 攀枝花钢城集团有限公司 | Steelmaking converter slagging agent and preparation method thereof |
| CN113667794A (en) * | 2021-07-07 | 2021-11-19 | 阳春新钢铁有限责任公司 | Method for manufacturing early-stage slag by using self-circulation slag pellets |
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| SU922155A1 (en) * | 1980-04-28 | 1982-04-23 | Предприятие П/Я А-3686 | Method for melting vanadium-containing steels |
| CN101613779A (en) * | 2008-06-25 | 2009-12-30 | 攀枝花新钢钒股份有限公司 | A kind of slag former and preparation method thereof and using method |
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